Help: Link Problems with the main menù

Goodmorning everyone,
I'm novice about joomla, this is my second joomla website, but I have a problem with the Musicity Template Main Menù:
I would create a Products Section with its sub Category (second level menù) as in this link:

http://www.carmade.it/index.php/product (Don't care about the new menù near at the article)

So, I have this problem: there are links problems with the second level menù (Categories), the Floor Lamps category doesn't link at its article. Why? Is maybe a javascript problem? Can you help me?
Thank you.